From WordNet (r) 2.0 (August 2003) [wn]:
plaza
n 1: a public square with room for pedestrians; "they met at Elm
Plaza"; "Grosvenor Place" [syn: place, piazza]
2: mercantile establishment consisting of a carefully
landscaped complex of shops representing leading
merchandisers; usually includes restaurants and a
convenient parking area; a modern version of the
traditional marketplace; "a good plaza should have a movie
house"; "they spent their weekends at the local malls"
[syn: mall, center, shopping mall, {shopping
center}, shopping centre]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Plaza \Pla"za\, n. [Sp. See Place.]
A public square in a city or town.
[1913 Webster]